TSA is armed??
Thankfully that is far from true.
No, TSA is not armed. But CBP officers are--they are sworn LEOs who carry firearms. Remember, until you clear passport control and customs, you technically are not in the USA, so you don't have rights under US law. No right to an attorney, you can be held without being charged with a crime, etc.
I definitely would
not advise trying to circumvent any arrival procedures.